In June 1998, David Duchovny made a memorable guest appearance on Dr. Katz, Professional Therapist, the beloved Comedy Central animated series created by Jonathan Katz and Louis C.K. The episode aired on June 29, 1998, and featured Duchovny playing a fictional version of himself as a patient in therapy — perfectly timed with the peak of his global fame during The X-Files.
David Duchovny as Himself on Dr. Katz
In the episode, David arrives at Dr. Katz's office wearing a black T-shirt bearing the word "BELIEVE" — a winking nod to The X-Files and Mulder's famous "I Want to Believe" poster. He immediately asks the receptionist Laura for a quiet corner where he can sit without being seen, reflecting the peculiar anxieties of celebrity life. His self-deprecating, dry performance was very much in line with the real Duchovny's public persona.
The transcript of the episode, painstakingly preserved by fans, captures the playful, absurdist humour of the show in full — with Duchovny clearly enjoying the opportunity to lampoon his own image. The appearance came during a period when The X-Files was at the height of its cultural influence, making Duchovny one of the most recognisable faces on American television.
About Dr. Katz, Professional Therapist
Dr. Katz ran on Comedy Central from 1995 to 1999 and was celebrated for its unique "Squigglevision" animation style and its habit of featuring stand-up comedians and celebrities playing themselves or thinly disguised versions of themselves as therapy patients. Duchovny's appearance placed him in fine company — the show's guest list reads like a who's who of 1990s American comedy and entertainment.